Damper.



L. L. BROWN & C. H. PATEK.

` DAMPBR.

. A'PPLIGATION FILED Nov. 7, 1912. 1,079,833, Patented Nov. 25, 1913.

cnLuMmA PLANOGRAPH CD.,w^sH|NGTDN, D. C.

UNTED STATES PATENT OFFCE.

LEIG-HTON L. BROWN, OF MINNEAPOLIS, AND CHARLES II, PATEK, QF BRAINERD, MINNESOTA.

DAMPER.

Specification of Letters Patent.

Patented Nov. 25,1913.

Application led November 7, 1912. Serial No. 729,976.

To all whom t may concern.'

Be it known that we, LEIGHTON L. BROWN, of Minneapolis, Hennepin county, Minnesota, and CHARLES H. PATEK, of Brainerd, Crow lVing county, Minnesota, have invented certain new and useful Improvements in Dampers, of which the following is a specipear from the following detailed descrip-` tion.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawingsforming part of this specification, Figure l is a sectional view through a smoke pipe, showing our invention applied thereto, Fig. 2 is a plan view of the spindle, Fig. 3 is a detail view of the spindle on which the damper is mounted.

In the drawing, 2 represents a section of smoke pipe, cylindrical in form, as'usual in pipes of this kind.

3 is a pin that is adapted to be inserted through holes in the wall of the pipe, one end of the pin having a head 4 which is seated against the pipe wall. The opposite pointed endpasses through the wall of the pipe on the other side of the center and is secured by suitable means, such as a cotter pin 5. The pin 3 has a longitudinal recess 6 therein adapted to receive a fiattened spindle 7 which is pivoted at 8 on the pin 3 near the head 4 and has an eXteriorly threaded arm 9 which projects outwardly and downwardly at an angle to the spindle 7 and is provided with a movable counterbalance weight 10. The recess in the pin 3 is of sufficient depth to bring the outer face of the spindle flush, substantially, with the surface of the pin so that it will not obstruct `the pushing of the pin through the hole in the pipe.

Upon the spindle 7 is a damper blade 11 which is preferably curved in cross section to fit the concave inner surface of the pipe when the blade is swung to a substantially vertical position, therebyv allowing the free passage ofthe air currents through the flue. We prefer to provide a socket l2 in the blade 11 into which thespindle 7, preferably tapered, is thrust, and we also prefer to provide ribs or corrugations 13 in the blade which will serve to strengthen it and permit the use of thinner material and will also increase the resisting .surface for the draft to act upon. The spindle is preferably provided with a notch 14 therein to receive the loop formed in the damper blade, the edges of the loop contacting with the end walls of the recess and locking the blade on the spindle. wWe are thus able to assemble the parts easily and quickly, as no bolting or riveting of the blade to its supporting spindle is required.

Evidently the damper blade can be balanced at any desired angle in the pipe by the adjustment of the counter-weight. The pin 3 may be thrust into the damper holes in the pipe from which an ordinary damper has been removed, and we are thus able to install our device without making any change in the pipe or cutting new or larger holes therein. Our device is adapted, therefore, for use with fines already installed as well as those that are being set up.

lNe claim as our invention 1. The combination, with a pipe, of a spindle pivotally supported thereon and project-ing into the pipe, said spindle having an arm projecting outwardly at an angle thereto, and a weight adjustably mounted on said arm, said spindle being adapted to swing to aposition against the inner surface of the pipe, said arm having an unobstructed travel to permit said spindle to assume a position in line with said pipe and against the wall thereof, and a damper blade mounted on said spindle and curved in cross section and tting snugly against the curved wall of the pipe when said spindle is swung to a position against said wall.

2. The combination, with a pipe, of a pin fitting into holes therein and extending across the pipe from side to side, a spindle plate having a socket therein to receive said spindle.

4l The combination, with a pipe, of a pin extending` across vthe pipe vand having its ends supported in' the walls of the pipe andprovided with a longitudinal recess, a

' spindle pivoted at one end onsaid pin and adapted to iitinto said recess, and a damper plate having a socket toreceive said spindle.

5. Thev combination, with a pipe, of ahead having' a part fitting Within a hole in the wall of the pipe, a spindle pivoted on said head and provided with a tapered inner portion to extend across the interior of the pipe, a damper blade having a socket to receive said tapered inner portion, said spindle having an outwardly projecting threaded portion and an interiorly threaded weight to engage the threads of said threaded portion.

6. The combination, with a pipe, of a spindle pivotally supported thereon and projecting into said pipe, a damper blade having a socket to receive said spindle and held thereon by rictional engagement beltween said plate and said spindle, said spindle having an arm extending outwardly at an angle therefrom and a weight adjustably mounted on said arm.

7. The combination, with a pipe, of a spindle pivotallj7 supported thereon and projecting into the pipe and provided with a notch or recess, a damper blade having a socket into which said spindle is inserted, said blade having a part to snap into said notch and prevent the accidental separation of said blade and spindle, and a weighted arm carried by said spindle.

In witness whereof, we have hereunto set our hands this fourth day of November,

LEIGITITON L. BROWN. CHARLES H. PATEK. Witnesses VALTER F. VVIELAND, R. T. Eoin-10mi.

Copies of thisvpatent maybe obtained for ve cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

